<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .border {
            width: 100px;
            height: 100px;
            border: 1px solid blue;
            background-color: bisque;
            border-top-left-radius: 10px;
            border-top-right-radius: 20px;
            border-bottom-left-radius: 30px;
            border-bottom-right-radius: 40px;
        }
        
        .shadow {
            margin-top: 50px;
            width: 500px;
            height: 200px;
            background-color: yellow;
            box-shadow: 5px 5px 5px grey;
        }
    </style>
</head>

<body>
    <div class="border"></div>
    <div class="shadow"></div>
</body>

</html>